Motor mounting



July1'4,1'959 J. c. CLAY 2,894,489

MOTOR MOUNTING I r Filed Dec. 3, 1957 I 2 sheetsesheet 1 FIG.\V

. INVENTOR Jeff 6. Clay ATTORNEU uly 14, 1959 J. 5. CLAY 2,894,489

MOTOR MOUNTING 2 Sheets-Shae; 2

'Filed Dec, 5, 1957 FIG.8

FIG.6

LINVENTOR Jeff 0. Clay ATTORNEY) United Sttes Patent MOTOR MOUNTING JeffC. Clay, Fayetteville, W. Va., assignor to The Long Company, Oak Hill,W. Va., a corporation of West Virginia Application December 3, 1957,Serial No. 700,488

7 Claims. (Cl. 121--36) The invention relates generally to improvementsin motor mountings and more particularly to a motor-handle mount of thetype that may be utilized in hand tools.

The tool which I have shown in the drawings is a drill of the type usedin mining operations, however, it is not intended that the use of myimproved motor mounting be restricted solely to mining drills, but itmay be utilized in any tool in which it desired to isolate vibration.

The primary object of this invention is the provision of a mounting formotors and other machines whereby the vibrations produced by theoperation of the machine will be isolated from the machine support orhandle.

. A further object is the provision of a motor mounting for handsupported tools, wherein the tool is of the type as to require supportat two separate locations, about the tool frame, and wherein unevenpressures at the two locations, as when feeding a drill into the work,will ordinarily result in improper or faulty operation of the tool; thatwill permit floating of the operative portion of the tool within theframe, neutralizing the effect of the uneven pressures.

A further object is the provision of a drill handle motor mount for useupon mining drills, wherein the drill motor and chuck are resilientlymounted Within the drill handle, preventing binding, distortion orbending of the drill bit when uneven pressures are exerted upon thedrill handle, such as often occurs when the drill handle is supported bytwo workmen.

A further object is the provision of a motor mounting for hand supportedtools having a frame associated therewith for the attachment of varioushandles.

Other objects and advantages of this invention will be apparent from thefollowing detailed description of a preferred embodiment of theinvention, taken in connection with the accompanying drawings, forming apart of this specification, and in which drawings:

Fig. 1 is a bottom plan view of a drill embodying my improved motormounting, showing two types of handles attached thereto.

Fig. 2 is a bottom plan View of the drill of Fig. 1, but showing adifferent type of handle attached thereto, in place of one of the typesshown in Fig. 1.

Fig. 3 is a front elevation of the drill of Fig. 1.

Fig. 4 is a side elevation of the drill of Fig. 1.

Fig. 5 is a front elevation of the handle supporting frame.

Fig. frame.

Fig. 7 is a front elevation of the drill motor supporting bracket.

Fig. 8 is a side elevation, partly in section, of the drill motorsupporting bracket.

Fig. 9 is a sectional view taken substantially on the line 99 of Fig. 3.

In the drawings, wherein for the purpose of illustration is shown apreferred embodiment of the invention,

6 is a side elevation of the handle supporting and wherein similarreference characters designate corresponding parts throughout theseveral views, the letter A generally designates a frame; B a bracket, Ca vibration isolation mounting for securing the bracket B to the frameA; D a hydraulic motor secured to the bracket B and disposed in a spacedrelationship within the frame A; and E handle means secured to the frameA.

The frame A comprises generally a cylindrical housing 15 defining achamber 16. This housing is provided with handle mounting means 18 thatare preferably flattened side portions 19 of the cylindrical housing 15,forming a base 20 to which the handle means B may be secured about theperiphery of the frame A. Threaded openings 21 may be provided throughthe flattened side portions 19 for securement of the handle means Ethereto. The flattened side portions 19 extend longitudinally outwardlybeyond the housing 15, at one side thereof, overlapping the bracket Band forming an elongated ibase upon which the handle means E can bemounted.

Outwardly extending flange portions 25 are provided about the outerperiphery of the cylindrical housing 15, forming an attaching flange forthe mounting of the bracket B upon the frame A. Openings 27 are providedcentrally of the flanges 25, for receiving the bolt of the vibrationisolation mounting C as hereinafter described. These flanges 25 are eachprovided with a counter bore 29, at one side thereof, for receiving alock washer and are provided with a counter bore 30 at the other sidethereof within which the vibration isolation mounting C may be socketed,as hereinafter set forth.

Various portions of the cylindrical housing 15 may be cut away, as at 31and 32 providing for the spaced insertion or accommodation of the portsof the hydraulic motor D through the frame A.

The bracket B may generally comprises rectangular housing 25 havingcut-away portions 37 and 38 about the outermost side edge thereof,providing openings through which a drain plug and port, respectively, ofthe hydraulic motor D may extend in a spaced relationship therefrom.

, The rectangular housing 35 is provided with an indented, flattened,central portion 39, offset in planar relation to the outermost portion,to which the hydraulic motor D is attached. Threaded openings 40 may beprovided through the portion 39 to receive the mounting screws of themotor D, as hereinafter described. A second indented cylindrical portion41 may be provided for receiving the forward mounting bearing of thehydraulic motor. An opening 42 is provided centrally of the bracket Bfor receiving the shaft of the hydraulic motor D therethrough.

Outwardly extending flanged portions 45 may be prov-ided about the outerperiphery of the rectangular housing 35, forming attaching flanges forthe securement of the bracket B to the frame A. An opening 47 may beprovided centrally of each of the flanges 45 for receiving the attachingbolt of the vibration isolation mounting C. The flanges 45 are eachprovided, at one side thereof, with a counter bore 49 for receiving alock washer of the vibration isolation mounting B and may be providedwith a counter bore 50 at the other side thereof within which thevibration isolation mounting C may be socketed.

The vibration isolation mounting C forms a resilient mounting means forattaching the bracket B to the frame A. The mounting C preferablycomprises a rubber sandwich 52 having fastening projections 53 and 54bonded thereto, forming a resilient cushion having outwardly extendingfastening means at opposite sides thereof. The

fastening projections 53 and 54 comprise bolts which extend through theopenings 27 and 47 of the frame 3 A and bracket B. Lock washers 55,fitting into the counter bores 29 and 49 of the frame and bracketrespectively, may be provided and hex nuts 56 may be secured upon thebolts 53 and 54, holding the frame A and bracket B securely to themounting C.

The hydraulic motor D may be of any conventional type, designed so thatit may be mounted upon the bracket B and spaced from and disposed mainlywithin the frame A, I have found that a Denison Hydroilic Pump/Motor,Model No. TNC 3F, C Series, flange mounted unit, manufactured by theDenison Engineering Division of the American Brake Shoe Company ofColumbus, Ohio, is a hydraulic motor which may be satisfactorily usedwith this unit, and I have shown this motor in the drawings.

The hydraulic motor D generally comprises a housing 66, within which themotor mechanism is mounted. Ports 62 and 63, having hose connections 64and 65 respectivel may be provided leading into the housing 60. As thehydraulic motor has bi-directional rotation, i-.e. it may be operated ineither direction of rotation, and the ports 62. and 63 will functionalternately as both inlet and outlet ports, depending upon the directionof rotation desired.

A flange 68 is preferably provided about one end of the housing 60,extending outwardly beyond the outer periphery of the housing 60. Thisflange 68 may be provided with threaded openings 69 within which aheli-coil thread insert 70 may be inserted, so that when cap screws '72are extended through the openings 40,

provided in the bracket B, and are threaded within the heli-coil inserts7f the cap screws 72 will be locked in position. The housing 60 may haveindented portions 73 thereabout so that the ends of the cap screws 72will not rub against the housing 6! A drive shaft 75 extends outwardlyfrom the hydraulic motor D, to which may be attached a drill chuck 76,.

as by a set screw 77.

The handle means E may be of any various types, dependent upon themanner in which the tool is to be held, two different types of which areshown in Figs. 1 and 2. I have shown a switch handle assembly 79 whichis common to both Figs. 1 and 2.

Theswitch handle type 79 includes a base plate 80, which is ofsubstantially the same rectangular shape as the flattened base 29 of theframe A, and which is secured to the base 20 by cap screws 81 which passthrough the base plate 80 and fit within the screw threaded openings 21of the base 26. Secured to and projecting outwardly from the base plateSi is a rectangular projection 32 which tapers into a cylindrical grip83. A switch assembly 85 is provided upon the grip portion 83 forcontrolling the operation of the hydraulic motor D.

Mounted upon the frame A opposite the switch handle assembly 79, in Fig.1, I have provided an elongated cylindrical gripping handle unit $7.This handle unit 87 is provided with a base plate 90 which is secured tothe base 20 of the frame A, opposite the switch handle assembly 79, bycap screws 92 which fit into the threaded openings 21 of the base 20.Secured to the base plate 90, and extending therefrom I have provided anelongated cylindrical grip 94 that may be of any desired length. As itis often desirable that two men operate a mining drill, it may benecessary to provide a cylindrical handle grip 94 of a length of severalfeet so, that an operator may grasp the handle and still face theworking surface on which the tool is to be used.

In Fig. 2 I have shown the same switching handle assembly 79, however, Ihave shown at the opposite side of the frame A, a modified formofgripping handle unit 9 6. This handle unit 96 is provided with a baseplate 97 which is secured to the base 2'9 of the frame A, opposite theswitch handle assembly 79, as by cap screws 98 projecting through thebase plate 97, into the screw threaded openings 21 provided in the base20. The handle unit 96 preferably comprises a U-shaped gripping portion99 which is secured to the base plate 97 In the assembly of this tool,the drill motor D is secured to the bracket B by the capscrews 72 andthe bracket B is secured to the frame A by means of the vibrationisolation mountings C. It will be seen from Fig. 9 that when these unitsare thus secured that the hydraulic motor D floats within the frame Aand that any shock that may be imparted to the drill motor, through thedrive shaft 75, will be taken up by the vibration isolation mountings Cand will not be transmitted to the frame A. As the handles E areconnected directly to the frame A and do not contact either thehydraulic motor D or the bracket B, such shock as may be imparted to thedrill motor D will thus not be felt by operators grasping the handles E,as the shock will be dissipated by the vibration isolation mountings C.

Various changes in the shape, size and arrangement of parts may be madeto the form of invention herein shown and described without departingfrom the spirit of the invention and the scope of the following claims.

I claim:

1. In a hand supported drill the combination of a bracket having acentralmotor receiving portion, a motor socketed within said motorreceiving portion of said bracket, attaching means for fixedly securingsaid motor to said bracket, a handle receiving frame interfitting aboutsaid motor and spaced therefrom, a handle fixedly secured to said frame,and resilient attaching means for securing said frame to said bracket.

2. A frame as specified in claim 1 comprising acylindrical housinghaving flattened side portions, said flattened side portions extendingoutwardly of said frame and overlapping a portion of said bracket,forming a base for the attachment of handles to said frame.

3. A bracket as specified in claim 1 comprising aplate having thecentral portion thereof disposed in offset planar relation with respectto the outer portion thereof, said central portion being socketed aboutsaid motor and said outer portion being attached tosaid resilientmounting means.

4. A motor mounting as specified in claim 1- wherein sa-id frame andsaid bracket are provided with like out-- wardly extending flangeportions, said bracket being secured to said frame by said resilientmounting means by attachment of said flanges tosaid resilient mountingmeans.

5. In a hand supported drill the combination of a frame comprising acylindrical housing having flattened handle receiving portions about theouter periphery thereof and attaching flanges extending outwardly fromsaid housing; a bracket having an indented central portion and attachingflanges extending outwardly from said bracket, resilient mounting meanssecuring said attaching flanges of said frame to said attaching flangesof said bracket, said resilient mounting means comprising a resilientcushion supporting outwardly extending fastening means at opposed sidesthereof which are secured to said attaching flanges; and a motor securedto said indented central portion of said bracket and extending withinbut in spaced relation to said cylindrical housing, between said handlereceiving portions, forming. a balanced compact drill unit.

6.. In a hand supported drill having a motor and. a

drive shaft, said motor having attaching sockets at one:

end' thereof; a mounting for said motor comprising a bracket having acentral motor receiving portion within which said motor is socketed,attaching means interfitting with said attaching sockets of said housingfor fixedly securing said motor to said bracket, a handle receivingframe interfitting in a spaced relationship about said motor, handlemeans fixedly secured to said frame, and

resilient attaching means for securing said bracket to said frame.

7. In a universally resilient mounting for the motor of a hand supporteddrill, the combination of a motor, a 'bracket fixedly secured to saidmotor, said bracket having attaching flanges extending outwardly beyondthe outer periphery of said motor, attaching means for fixedly securingsaid motor to said bracket, a frame interfitting about said motor in aspaced relationship, said frame having attaching flanges aligned withsaid first mentioned attaching flanges of said bracket, handle meanssecured to the outermost surface of said frame, and resilient attachingmeans securing said bracket to said frame supporting said motor withrespect to said handles in a universally resilient manner with respectto shear, compression and uneven pressures resulting from the operationof the drill.

References Cited in the file of this patent UNITED STATES PATENTS

